Tag Archives: Shortwave Radio

A16 Update: Alan Roe’s guide to music on shortwave radio

Alan-Roe-Music-A16

Many thanks to SWLing Post contributor, Alan Roe, who shares his updated  Music on Shortwave list for the A16 period.

If you love listening to music on the shortwaves, you’ll love Alan’s free guide.

Click here to download Music on Shortwave A-16 (PDF).

Guest Post: Profile of Rod Wallberg

Many thanks to SWLing Post contributor, Dan Robinson, for the following guest post–an interview with noted shortwave repair technician, Rod Wallberg:


WP_20160521_11_59_46_Pro

Profile: Rod Wallberg

by Dan Robinson

Rod, tell us a little bit about yourself, your background, how you got interested in radio as a hobby, what focus you have now?  Are you also an amateur radio operator?

My dad was connected to electronics mainly in radio for many years. He received his training during World War II — he was a radar technician and operator stationed in Florida. Later, as the economy was adjusting, he found a nitch as a television and radio repairman. He was also licensed as an amateur radio operator.

I think some of this rubbed off on me! I would listen to my dad’s receivers to all sorts of short wave stations and amateur radio operations. I even remember listening to Mississippi River barge traffic and even caught ‘number stations’ in the utility areas of shortwave These were heard on old tube type receivers like the Hallicrafters and military receivers.

My first shortwave receiver was the famous SONY ICF-2010 in 1985. A leap ahead of the old tube rigs it was! Digital readout and memories! With precise tuning and lock on frequency, it was a dream to use. This really piqued my interest and since I was a CBer at the time, HAM radio was just a written test away, including 13 word per minute Morse Code to get my general license.

Electrons must have rubbed off on me from my dad as I dove into repairing electronics. I did this mainly to keep my own radios going and repair them if they broke down. This included building of antennas for both receive and transmit, from my understanding of amateur radio.

Some 20 years later my SONY 2010 lost it’s ability to ‘hear’ signals. It was the usual FET front end failure and since mine was an early example it did not have the protective diode protection.

Taking the radio apart was pretty simple and on-line resources told me where to look. Radio Shack carried a decent FET replacement, and in short order I had my wonderful SONY back in working order. I even changed out the rather dim LED back light!

Around this time I had joined the Yahoo user’s group for the SONY ICF-2010 and it was not too many years that owners were looking for someone to repair their receivers. I answered a few help wanted ads found on the group. Word spread and suddenly I found myself in the repair and maintenance of the wonderful SONY 2010!

I was receiving five to ten packages a month of receivers to be repaired, not only the 2010 but others like the ICF-SW7600, SW55, SW77 and the SW100. Panasonics, Grundigs and Kenwood receivers also make their way to me!

The biggest problem was finding parts for all these radios. SONY was not making or stocking parts and the few warehouses were running low. I had to think fast so I went to places like Ebay, thrift stores and HAMfests to find ‘parts’ radios to get my customer’s receiver working again. Most of these finds were fully restorable and I could easily sell them for a nice profit but they serve to keep owner’s radios going.

Which receivers do you personally own, or have you owned, that you have the highest respect for in terms of their design?

I have eight working 2010s as of this writing. and once in a while I will sell one!

What challenges exist today standing in the way of being able to repair these classic radios — are capacitors and other small components still available, and if so from where?

Capacitor problems on the SONY receivers are the worst as the damage can be extensive. Only around 50% of SW77s survive this calamity. One of the worst problems for all portable radios is battery leakage. This can be very destructive to the copper traces and components.

How are your family members toward this kind of work you do — it does bring in extra cash, so are they supportive?

My wife is very supportive with this venture and she keeps the ‘books’ on this business.

What role has the Internet and specific Yahoo groups played in your getting business from collectors who want to preserve their equipment and rescue it from the trash heap?

Thanks to the Internet, IRC chat and Yahoo groups, communication connects me to customers and I do not advertise as I consider this a hobby. Since I have been doing this for about ten years, I have repaired at least several hundred SONYs, mostly the 2010. I just charge a base fee plus return postage. The earnings have paid for the spare parts radios, tools and parts including several solder stations along with a hot air rework unit for surface mount technology. I also use the funds to keep my HAM radio hobby going and make the annual trip to Dayton. I find a few ‘parts’ receivers there from time to time!

What’s your take at this point on how much longer these classic radios will be able to be fixed?   Clearly after you end your services to the radio community there will be no one else left?

I consider this a hobby to keep the old receivers going! I plan on doing this for a while and as long as I can find the needed parts. Recently I discovered a source for the SONY Q303 problem, the original FET is getting scarce and the MPF-102 Radio Shack part is headed that way. My trips to Dayton include a stop at Mendleson’s, a rather large surplus outlet that has a huge stock of electronics. There I found a great replacement, close to if not better than the original 2SK152!

Thanks to Mouser and DigiKey for all the small parts they can supply and they both do small orders!  I usually can be reached at my best email at poikaarod@gmail.com or my (not so good) kb8dns@yahoo.com

Finally, if you could put into a few words what drives you when working on these radios, would you say it comes down a real appreciation or love for the technology and efforts that companies used to put into manufacturing these radios?

The wonderful memories of sitting in front of the receivers, listening to radio from all over the World, the memories of my dad and all the friends I have made from my repair service, keeps me going ahead with the repairs and I will do so for as long as I can!

Guest Post: My Evolving, Morphing, SW Listening Station

Many thanks to SWLing Post contributor, TomL, for the following guest post:


Sony-2010

My Evolving, Morphing, SW Listening Station

by TomL, May 26, 2016

My interest in radio listening has been rekindled after a long hiatus in parallel to my dwindling interest in Mainstream Media.  It is now about 8 years without cable TV and I seriously do not miss it, especially with the evolving nature of discovery with respect to other forms of media.  SWL radio was important to me in my formative years during the Cold War; fascinating were the many ways governments used shortwave radio to influence populations, each with their own brand of propaganda!  Young people today know nothing about the endless (and entertaining) tirades of East German editorial commentaries denouncing the evil, decadent West.  Or, of the free, large-sized envelopes full of travel and promotional brochures, pennants, bumper stickers, and booklets sent from the government broadcasters such as Poland, Hungary (yes, communist countries!), Australia, Netherlands, etc. just for sending in one simple QSL report!!!

I quickly realized that those days are gone forever, consigned to a period of history where radio was THE main method of disseminating copious amounts of government propaganda to very large swaths of humanity.  Now, the internet and cable TV fulfill that function in a much more CONTROLLED manner, both technically and socially (Big Brother like).  So, I have diversified my interests and have an unusual listening station.  It is multiple things in one small space.  You see, I live in a very small condo in a noise-plagued environment with only a 2nd floor wooden deck (owned by the Condo Association!) in which to put up any outside antennas.  Only a single “Dish” type antenna is allowed.  So my shortwave antenna needs to be well hidden.  Same for the TV antenna, since I also have a north-facing deck, I cannot have any line-of-sight to the Southern sky for a Dish.

The first wire antenna strung from the top and brought inside was a dismal failure receiving nothing but noise.  I gave up for a couple of years.  I built a loop TV antenna and mounted an FM antenna instead since those were less susceptible to noise issues.  Also recently added to this station are two cheap 4G antennas with wires into a single Verizon USB aircard plugged into my computer and getting up to 14 mbps performance.

But, I still wanted to try shortwave radio again (and medium wave too) but the noise issues were very, very discouraging.  S9 noise on some bands.  Tried preselector, a noise “phaser”, different lengths.  Nothing worked.  However, I read something from an amateur radio operator in Northern California who had a space problem.  He put up a helically-wound-vertical (HWV) antenna with radials for 160 meters (John Miller HWV antenna).  I also read about various “broomstick” antennas.  So, I tried my own version with an old RF Systems Magnetic Longwire Balun I still owned and NO radials.  Put it together with a 2 foot long, 4 inch schedule 40 PVC pipe wrapped in 200 feet of 18 awg magnet wire.  Well, still noisy but, at least now I had a portable antenna!

So, I went camping in March of this year!  Holy Cow, was it cold out but the helical antenna performed well enough to hear All India Radio for my very first time, a small 1kw Mexican station in the 49 meter band, and various others from Asia that were elusive for me in the distant past.  I was finally encouraged again to continue my research.  I did this a few more times and finally got tired of going camping just to listen to a radio!  NOISE at home was still the big bugaboo to kill (and it still is).

I read up on Common-mode noise travelling on ground and shield components of antenna systems.  So I bought a bunch of toroid ferrites of different types to cover different frequencies (something about initial permeability….) to make my own homemade “Super RF Choke” to cover all frequencies made on a Home Depot Homer bucket lid, winding the coax 5 or 6 times through all the toroids, the full diameter of the lid.

Measurements by Jim Brown published on the web (RFI-Ham.pdf), pages 32-33) indicate good choke performance using coax with these larger-sized coils.  I still hoped to salvage the use of the HWV antenna.  So, added the choke and noticed some improvement across most bands (less noise).  Medium wave broadcast was not effective and decided that I did not want to keep tuning an antenna that HAD to sit outside to get away from the noise inside my listening station.

I also shut off the power to my condo and found out which noise sources were mine vs. other noise that came from all the neighbors (very important step to do!!!).  For instance, I did not know before that USB charging adapters are PURE RF-NOISE EVIL in an innocently small package?!?!?!  I rearranged wiring to shut off certain devices and power strips when I want to listen to the radio!

So, I kept reading.  Found out about another magnetic balun from Palomar.  Tried it but not impressed –  performance was too lossy compared to the good old RF Systems MLB (what a great product that was back then!).  Kept reading and found out good things about the EF-SWL from PAR electronics (product is now made and sold by LNR).  The ground connections on it (and the Palomar) intrigued me.  So, I decided to go to Hamvention for the first time, even though I was skeptical of finding anything useful, I told myself, I could at least buy the EF-SWL on sale (which I did).

Installed EF-SWL to the HWV but no difference compared to the RF MLB. The antenna did perform better outside on the deck in the far corner, so there it still sits.  Then, I hooked up the wire they gave me with the EF-SWL to the ground and it resulted in MORE noise.  Then, took off the jumper (which connects the coax shield to the ground side of the balun) and connected only the middle post (balun ground) to the ground wire and a lot LESS noise resulted along with a small reduction in radio signal level!!!  Finally some progress – the wire seems to be acting like an old-fashioned “counterpoise”, which is misunderstood these days.  Apparently, back in the 1930’s-1950’s, people involved in radio knew the differences between an “earth ground”, a “radial system”, and a “counterpoise”.  Technically, they are all different and their use is different as a result.  Now, people moosh all these concepts together interchangeably which risks creating very ineffective antennas.

Photo of installed EF-SWL at the bottom of the HWV with coax at the output, the red magnet wire input on top, the middle post for the counterpoise wire, and the coax shield post is unused. 

Photo of installed EF-SWL at the bottom of the HWV with coax at the output, the red magnet wire input on top, the middle post for the counterpoise wire, and the coax shield post is unused.

The HWV antenna now has 600 feet of 26 awg teflon wire on the outside PVC, an inside 3 inch PVC “sleeve” with 102 Russian ferrite rods, a 56 inch stainless steel whip at the top, and one inch hole through the center to accommodate the 7 foot PVC mount to my carbon fiber photo tripod when I take it camping again.

So, I am on a new quest to understand counterpoises, how to actually TUNE them and, hopefully, how to use them to increase the performance of shortened antennas like my HWV (something about reducing the dB loss incurred by shortening….).  A second result I hope will be how to use the counterpoise to keep signal-to-noise ratio high at the same time (maybe with this used $100 Dentron Super Tuner bought at Hamvention?).

Transmatch

Also bought at Hamvention (thanks Thomas W. for the tip!!) and installed Bonito’s Galvanic Antenna Isolator GI300.

If input directly to the input of the radio, led to more reduction in noise and signal!!  Too much actually, so I took off my Super RF Choke and now I had a better result compared to the EF-SWL with the RF Choke (slightly cleaner sound with less hissy noise).  Apparently, the GI300 completely isolates the coax shield, better than my homemade choke!  The requirement is to use coax from the feedpoint and not bare wire.  I then placed a few clamp-on ferrites I bought from eBay to help with slightly higher frequency choking of the shield at various places on the feedline.

Bonito-Galvanic-Isolator

Photo of GI300 on radio with NO extra coax lead into the radio at right (Thanks to Dennis Walter of Bonito for that tip)

Before Hamvention, I wanted to try out AM broadcast.  I wanted to know more about this “FSL” antenna a well-known eccentric from Ireland (Graham Maynard FSL) developed before he passed away a few years later.  So read up and bought a whole bunch of ferrite rods and tried different configurations.  Well, my particular design did not work all that well because I did not follow directions for winding wire into a balanced design.  So, I added all those ferrite rods to the 2 foot HWV (inside a 3 inch thin-walled sewer PVC pipe).  The antenna is louder down to about 3 MHz with a stronger signal (including noise) than without.  I do not have measurements, and find it too time consuming to document.  Maybe one day, I will compare and document by sliding the ferrites out on the 3 inch PVC and measure actual signal levels.  The ferrite sleeve seemed to pick up MORE noise and radio signal than without it.  So, if you need more signal strength in a small package below 7 MHz, then the idea seems to have merit.  But since it increased noise as much as radio signals, it has limited usefulness to me.  I do have another project where I will put ferrite bars onto a tuned medium wave loop antenna (Tecsun AN100) that is much more portable and directional.  The bars and loop were both relatively inexpensive from eBay.  The ferrites change the tuning lower, so I have to figure out how to make it tune higher again…….

Photo of unfinished MW loop project.

Photo of unfinished MW loop project.

Summary

Evolving understanding of dealing with major problems like overwhelming noise and limited space have led to unexpected additions to my SW Listening Station:

  • A 2 foot long, 4 inch diameter helically-wound-vertical antenna (HWV) with way too much wire on it (and now inserted with 102 160mm Russian ferrite rods on a 3 inch diameter “sleeve”). Originally built because of its portability.  Can now be mounted on a carbon fiber photo tripod with a 7 foot 3/4” PVC pipe through the center length
  • A magnetic balun from LNR (designed by Parfitt) attached at the feedpoint of the antenna
  • A proprietary galvanic isolator from Bonito attached right at the radio’s antenna terminal
  • A “boat anchor” Dentron Super Tuner attached to the HWV feedline to help tune it
  • An unfinished MW loop antenna with more ferrite bars
  • An unused, homemade toroidal Super RF Choke
  • Clamp-on ferrites everywhere in proximity on wires and power leads
  • Re-arranged power strips and wires as needed for easier shutoff in functional groups

For shortwave, I still pick up mostly noise on many bands.  With the uncalibrated S-meter on the ICF-2010 – 49 meters is around S1 (before about S3).  31 meters is MUCH improved and is now listenable to stronger stations (S2 instead of S7 noise!).  Even 19 and 16 meters is improved from S6 to S7 down to about S3 now – noise still too annoyingly loud to understand any language being spoken however.  And forget about DXing from this location!  Will have to go camping again soon.

BUT, listening now to Voice of Greece, Radio Nacional Brasilia, or Radio Romania International is a much cleaner sounding experience than just a couple of months ago.  They are there to re-discover and appreciate, even though many speak a foreign language and I do not understand a word they are saying!  Also, there is the odd observation (like just this morning), that I can actually learn to enjoy listening to Country Music if it is the unique sounding Australian flavor!!

Do I miss cable TV??  Not a bit!!

Future investigations

  • Employ the Dentron Super Tuner in various configurations to find any improvements (currently attached to the coax of main feedline from the EF-SWL, it is helping tune different SW bands (not sure why it helps, does not make sense, must be a mismatch between coax and balun)
  • Obtain old book(s) on counterpoises
  • Get a Linear DC power supply for use with all the EVIL RF-spewing devices that use 5 volts. Maybe this one:  (Tekpower 3Amp Linear)
  • Replace any cheap/old RG58 cables with LMR-240 or similar
  • Finish the AM loop w/ferrites so I can take it places
  • Perhaps an ultra low-noise outdoor amplifier for the HWV, depends on counterpoise experiments: (Wellbrook ALA100M-2)  (I don’t want to spend that much money now)
  • Somehow use a noise antenna with a better phaser: (DX Engineering NCC-1) (gulp, don’t want to spend THAT much money now also!!!)
  • Get some relief from background noise using a really robust noise blanker. I don’t want to spend on the portable radio, would rather get something like the Bonito 1102S or an ELAD model both supposed to have excellent audio quality and excellent DSP noise blankers.  But that means getting a cheap laptop to run it and replacing the Sony.  MOAR big bucks…. but not right now
  • Maybe a real loop antenna, BUT it has to be remotely tunable and remotely turnable and small enough to HIDE. MOAR big bucks, sigh….

TomL from noisy Illinois, USA



Many thanks for sharing your experiences, Tom! Also, it was great meeting you at the Hamvention this year.

I must say that there is something to be said for brute-force experimentation when it comes to mitigating radio interference. I hope you keep us posted as you continue to experiment and improve upon your unique listening system.

“The Classics Experience” with Paul Walker this weekend!

Paul Walker at KIYU Alaska.

Paul Walker at KIYU Alaska.

Many thanks to SWLing Post contributor and broadcaster, Paul Walker, who writes:

The next broadcast of “The Classics Experience” with Paul Walker is rapidly approaching. It’s a 2 hour broadcast of rock and roll music with some country classics scattered in and occasionally a few audio surprises.

The next broadcast schedule looks like this:

WINB 9265khz Saturday June 4th 0230UTC to 0430UTC
WRMI 7570 Saturday June 4th 0400 to 0600UTC

WINB’s principal radiation direction is 242 degrees true or almost due southwest. Looks to cover parts of the Midwest/Southern US pretty well: Kentucky, Tennessee, Alabama, Georgia, Mississippi, Texas and into Mexico. WINB claims “At the long range, the main beam hits Eastern Australia and New Zealand. The rear lobe hits the Mediterranean area of Eastern Europe.”

WRMI’s 7570khz signal beams at a 315 degree azimuth to Vancouver, Canada. It is very listenable, near local like on good nights here in rural Central Alaska.

No appeals for donations, no begging for sponsors, no political or religious rantings and ravings nor any silly personal opinions. I promise. Just good music for the fun of it!

Seriously, I fund the broadcast out of my own pocket about once every 2-3 months just for the heck of it!

Reception reports are only accepted by regular postal mail. $2 appreciated to cover the costs of the QSL cards I had printed up and the postage. Reports can be sent to:

Paul B. Walker, Jr.
PO Box 353
Galena, Alaska 99741 USA

FYI: There are two surprises: I will have text in the MFSK32 format in the second half of the first hour and then a picture in the MFSK32 format in the second half of the second hour.

Thanks, Paul, for putting you good music show on the air! We’ll be listening for “The Classics Experience” this weekend. Note: since the broadcast times are in UTC above, listeners in North America should tune in during the evening on Friday, June 3rd. Compare your local time to UTC.

Video: Listening to Radio Australia via the BST-1 car shortwave radio

Car-Shortwave-Radio

I’ve been evaluating the BST-1 car shortwave radio for a review that will soon appear in The Spectrum Monitor magazine.

I must admit: it’s mighty fun to be able to listen to shortwave broadcasters through my vehicle’s audio system.

Last week, the BST-1 saved my sanity, too. You see, I was in a rush to get to a morning appointment in town when Murphy’s Law stopped me dead in my tracks!

A construction crew began resurfacing a two mile (unavoidable) stretch of asphalt road on my route. As the road crew set up their gear, I was forced to wait a full 20 minutes (!!!!) before being allowed to pass.

Fortunately, I remembered that I had the BST-1 hooked up in the car. I tuned to 9580 kHz and there was Radio Australia. Somehow, hearing my staple broadcaster soothed my nerves. I accepted that I would be late for my appointment and simply enjoyed the moment. In your face, Murphy–!!!!

Here’s a very short video I made while stopped:

Click here to view on YouTube.